Solutions / Data Labeling

The #1 Network for Hiring Data Labelers

Browse our data labeling solutions below and post a job to hire from 128,000+ pre-vetted annotators — for any annotation type, any platform, any scale.

Post a Data Labeling Job Get a Managed Quote

Data Labeling Solutions

Hire experienced annotators for any structured data labeling workflow — from image bounding boxes to medical imaging segmentation.

Document Annotation

Entity extraction, table labeling, grounded Q&A, and more

Entity Extraction

Table Labeling

OCR Correction

Document Classification

Image Annotation

Bounding boxes, polygons, keypoints, classification, attributes, and more

Segmentation

Pixel-level semantic, instance, and panoptic masks and more

Semantic Segmentation

Instance Segmentation

Panoptic Masks

Pixel-Level QA

Video Annotation

Object tracking, temporal labeling, action recognition, QA, and more

Text Annotation

Text labeling for NLP and content tasks across 70+ languages

Named Entity Recognition

Sentiment Analysis

Text Classification

Relation Extraction

Speech and Audio Labeling

Transcription, diarization, and audio event labeling for any use case

Transcription

Speaker Diarization

Audio Event Detection

Phonetic Labeling

Time Series Annotation

Event and anomaly labeling for sensor data across any industry

Event Detection

Anomaly Labeling

Signal Classification

Temporal Segmentation

Point Cloud Annotation

3D cuboids, segmentation, tracking, sensor fusion, and more

Medical Imaging Annotation

Segmentation and labels for CT, MRI, pathology, and other modalities

Satellite Imagery Annotation

Mapping-grade labels for geospatial AI and Earth observation applications

How It Works

How Data Labeling Works on OpenTrain

Step 01

Post Your Labeling Requirements

Describe the annotation type, data modality, volume, quality targets, and which tools your team uses. Published pricing means no negotiation — you know costs upfront.

Step 02

We Screen & Match Annotators

Every candidate passes a live domain assessment and interview. You receive a curated shortlist of annotators with verified experience in your specific labeling workflow.

Step 03

Review & Hire Your Team

Browse matched annotators with verified skills, annotation accuracy scores, and language capabilities. Pick exactly who fits your project requirements.

Step 04

Deploy Into Your Annotation Platform

Add annotators directly into Label Studio, Labelbox, CVAT, V7, Argilla, Encord, or any platform you use. They start labeling on day one — no migrations needed.